1.6tdci turbo pumping
I've had my vehicle for 2 years and done 39000 miles and it has alway had this issue, when accelerating between 2000-3000 rpm it feels like power is on off this on off feeling only last a second or so not noticeable to passengers or rpm, I have changed oil every 7000miles, regular redex, it now has k&n, remapped, blanked egr
Please help